| <!DOCTYPE html> |
| <html class="reftest-wait"> |
| <title>CSS Positioned Layout Module Test: 'overlay' rendering on top after transition finished</title> |
| <link rel="help" href="https://drafts.csswg.org/css-position-4/#overlay"> |
| <link rel="help" href="https://html.spec.whatwg.org/multipage/popover.html"> |
| <link rel="match" href="green-ref.html"> |
| <script src="/common/reftest-wait.js"></script> |
| <style> |
| #transition-in, #red { |
| /* Force display:block both popover open or closed to not rely on |
| @starting-style or display transitions. */ |
| display: block; |
| border: none; |
| width: 100vw; |
| height: 100vh; |
| } |
| #red { |
| position: fixed; |
| background-color: red; |
| } |
| #transition-in { |
| transition: overlay 0.1s step-end; |
| transition-behavior: allow-discrete; |
| background-color: green; |
| } |
| </style> |
| <div id="transition-in" popover></div> |
| <div id="red"></div> |
| <script> |
| let transition_in = document.querySelector("#transition-in"); |
| transition_in.addEventListener("transitionend", () => takeScreenshot()); |
| // Force style update to have before-change style for overlay transition. |
| transition_in.offsetTop; |
| transition_in.showPopover(); |
| if (getComputedStyle(transition_in).overlay != "none") { |
| // Transition didn't start, force a fail condition. |
| transition_in.style.backgroundColor = "pink"; |
| takeScreenshot(); |
| } |
| </script> |
